I remember having Dynamic Arranger on my first arranger keyboard ever the Roland E70, simply great. Later on when I had the G800 and used styles programmed and/or tweaked by a good friend of mine again the Dynamic Arranger came up trumps. Which Roland keyboard player has not got the "Rosenberg " style loaded with dynamics, yes sir programmed by that friend that I mentioned.
Although I am a happy Korg and Yamaha player I do miss that feature but then with the arrival of an E-50 shortly I can again enjoy those dynamics !

regards
John